I don't have any sort of plan. I don't think our world is a great one to be making plans in, with things stacked as precariously as they are. I've also seen that plans can be so easily ruined by the simplest of occurrences.
Those I know with some kind of solid life plan are generally those with a lack of imagination, and their plans tend to be based around the most dull things. Conversely, everyone I know that is remotely exciting generally hasn't got a clue what they're doing or what they might want to be doing in a few years time.
I think finding what you're best at and trying to do that as much as possible is far more important than forming some sort of long term plan. Generally we enjoy doing the things we're best at, and we do best what we do most.
With solid long term plans you can end up goal obsessed and before you know it you've died having not paid attention to anything except the next goal.
The chances are, with the human condition being the way it is, if you actually made good on your plans and achieved everything you set out to achieve, you'd find yourself no more content than before you started. So learning to feel complete with ones lack of completion might be a wiser move.
Life, you could say, is a bit like cycle touring. Some people like to meander and take in the views, to chat and stop for a pint on the way. Others like to get their heads down and crank away to the next check point as quickly as possible. The latter might get to the end quicker and earn internet bragging rights, but the former probably got more from the trip.
Unless you actually enjoy going hell for leather all the time, which can of course be quite fun. Speed just has that one unfortunate side affect - the faster you go, the quicker you'll invariably get to the end.